How to use QUARTILE function in Excel?

The `QUARTILE` function in Excel is used to calculate the quartiles for a given set of data. Quartiles are used to divide a data set into four equal parts. The function has the following syntax:

QUARTILE(array, quart)

`array`: This is the range of cells or array of numbers that you want to analyze to find the quartile.
`quart`: This specifies which quartile value you want to return. It can be:

`0` for the minimum value (0th percentile);
`1` for the first quartile (25th percentile);
`2` for the median (50th percentile);
`3` for the third quartile (75th percentile);
`4` for the maximum value (100th percentile).

Here is an example of how you might use the `QUARTILE` function:

Suppose you have a set of data in cells A1 to A10. To find the first quartile of this data, you would use the function as follows:

=QUARTILE(A1:A10, 1)

This formula will calculate and return the value of the first quartile in the specified range.

Notes:

Starting from Excel 2010, Excel introduced the `QUARTILE.EXC` and `QUARTILE.INC` functions as part of changes aimed at improving statistical calculations. `QUARTILE` is equivalent to `QUARTILE.INC` and computes quartiles based on inclusion.
Ensure all cells in the specified range contain numeric data to get accurate results.
Use `QUARTILE.INC` if you want to include the first and last data points to calculate the quartiles based on the entire range and `QUARTILE.EXC` if you want to exclude these points which may sometimes give a slightly different result due to different calculation methods for quartiles.

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